[development] Field Approval on D7

Hello, I'm looking for a way to have an approval process on a field, specifically on an multi image field. Users can upload images on a multi image field and I want to manually go over each image before I approve it for publishing. The catch is that if someone updates an existing field and only changes one image, I don't want to unpublish the entire profile but either leave it as it was or just hide the unapproved field. Thanks Idan